pretty-show: Tools for working with derived `Show` instances and generic
inspection of values.

We provide a library and an executable for working with derived Show
instances. By using the library, we can parse derived Show instances into a
generic data structure. The ppsh tool uses the library to produce
human-readable versions of Show instances, which can be quite handy for
debugging Haskell programs. We can also render complex generic values into
an interactive Html page, for easier examination.